The figure shows the estimated percentage reduction in the number of new HIV infections (compared to the Status Quo) for a range of campaign effectiveness from 0% to 50% under the different behavior change scenarios (Increased Monogamy, High-Risk Partnership Reduction, Untargeted Partnership Reduction) for the four study countries, Swaziland (a), Tanzania (b), Uganda (c), and Zambia (d). 95% confidence intervals are indicated for each sample point.